X11 colors are a standardized color system that was first introduced in 1987 by the X Window System. The X11 color system includes a total of 147 colors, each identified by a unique name such as "AliceBlue" or "DarkOrange". These colors are widely used in web design, graphic design, and software development. They are supported by most modern operating systems and software, making them a reliable and consistent choice for color selection. Whether you're creating a website, designing a logo, or developing an application, X11 colors are a great choice for achieving consistent and accurate color representation.